a team of investigators for the u.s. coast guard, as well as for the national transportation safety board, are trying to figure out the source of sunday's fire that brought this cruise to a screeching halt. they have a lot of work ahead of them as they try to go into the engine room and figure out where the fire may have started. it might even have been somewhere else. they have to look through all of the systems on board the ship. they've already spent time talking with passengers before they disembark, and went to the far corners of the earth going back home again. but they'll also be examining the procedures that were followed after that fire took place. there is another engine room they could have turned to as an alternate source of power. however, investigators are saying that might have been a risky move. >> in this case, they may have been able to restore power, but really the safe thing to do was to tow the vessel back into port rather than try to reenergize a power system that was damaged by fire. >> reporter: i